🌿 Morphology
🌞 Growing conditions
🌍 Origin and family
🌾 Uses
Warning: Despite the care taken in writing this sheet, it is essential to cross-reference sources before using or consuming any plant. When in doubt, consult a qualified professional
Permaculture uses
Sea Holly roots are edible when young and can be candied or roasted, although consumption is not widespread due to potential toxicity and scarcity. The young shoots can also be eaten like asparagus after boiling. Medicinally, it has been used as a diuretic and expectorant, but is not commonly used today. In permaculture gardens, it is primarily valued as a beautiful ornamental, drought-tolerant plant attracting pollinators to coastal areas.
Permapeople description
Eryngium maritimum, the sea holly or seaside eryngo, is a species of flowering plant in the family Apiaceae. It is native to sandy coastal areas of Europe and North Africa. It is a hardy perennial plant with spiky, bluish-grey leaves and blue flowerheads. It is adapted to harsh coastal conditions and is often used in xeriscaping.
Botanical description
Eryngium maritimum, commonly known as Sea Holly, is a blue-green perennial plant in the family Apiaceae (Umbelliferae). It grows up to 60 cm tall, with spiny, leathery, blue-green leaves and globe-shaped flowerheads consisting of many small, tightly-packed blue flowers surrounded by spiny bracts. The plant has a deep taproot, enabling it to thrive in dry, sandy coastal habitats. The stems are branched and often have a waxy bloom. The fruits are small and spiny.
Companion planting
Sea Holly thrives in similar dry, sunny conditions as other drought-tolerant coastal plants. While specific companion planting data is limited, it generally benefits from association with other Mediterranean and coastal species that prefer well-drained, sandy soils. Avoid planting near plants that require consistently moist soil.
Propagation methods
Sea Holly can be propagated by seed, root cuttings, or division. Seeds should be sown in the fall or stratified before spring sowing. Root cuttings can be taken in the winter. Division of established plants is best done in spring or autumn.
History and traditions
Historically, Sea Holly roots were used in traditional medicine as an aphrodisiac and diuretic. It was also candied and consumed as a sweet treat. In folklore, it was believed to possess love-enhancing properties. Due to habitat loss and over-collection, its use has largely diminished and it is now protected in many regions.
Usage calendar
Flowering occurs in summer (July-August). Seeds ripen in the fall (September-October). Planting is best done in spring or autumn. Pruning is generally not required, but spent flowerheads can be removed to maintain appearance.